adding logout_out_path to before block
Add option to skip creation of test with TestUnit

For the purpose of this tutorial, because testing will be done with RSpec, wouldn't it be easier to append the `--skip-test-unit` option to avoid creating the `test` directory and all the associated files? And then we could remove line 87-97 of the article.
Update section under Using RSpec instead of TestUnit
Remove the last sentence from line 85

I missed that sentence in the previous pull request.
Add note for '--skip-test-unit' option to the rails command
Fix typo on line 55
Remove periods from the end of bullet points.
Capitalize numbered bullets to match other bullets
Minor grammatical copyedit.
Fix project name typo in page titles.
Make directions a bit more explicit.

For all of this to work multiple windows needed to be opened. Just add
a bit more text explaining this.

Also, remove bullets that were inconsistent with how the rest of the
page was formatted.
clarified what version of ruby uses the simplified hash syntax
small grammat fix
Update Contact Manager/Haml

In the section above __Write Less Markup__ instructions were given to add a `to_s` method for the models. The erb file still lists company.name despite refactoring.

Changes: 

- Use to_s method on Company
- Add CSS class "actions" to ul
Add version to haml gem
- Version 3 was the last version of haml to include html2haml
Slightly more consistent hash notation
correct 2 typos
more consistent hash notation
fix typo of 'anythigng' to 'anything', in I4
explicitly mention adding the attr_reader for :id when the @id attribute is added on the Idea class. Something that would be obvious to some, but something I missed - causing me to wonder why the new declaration of  in the like form on the index page was failing out.